"No DNS domain configured" when I join AD domain

I have an issue to join Active Directory with my DNS. Someone can help me with this issue. I checked my /etc/hostsfile and everything is fine.

root@terminal:~# sudo net ads join -k 

Result:

Using short domain name -- COPICOM Joined 'TERMINAL' to dns domain 'copicom.local' No DNS domain configured for terminal. Unable to perform DNS Update. DNS update failed: NT_STATUS_INVALID_PARAMETER root@terminal:~# net ads join 

Result:

Failed to join domain: failed to lookup DC info for domain 'COPICOM.LOCAL' over rpc: The attempted logon is invalid. This is either due to a bad username or authentication information. 

Content of /etc/hosts :

127.0.0.1 localhost 127.0.1.1 fileserver 10.128.35.2 copserv.copicom.local copserv 

Thanks for support.

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